This lesson is based on an online booklet that provides an introduction to the study of earth's history, published by the USGS.
Using careful analogies and written historical records, the authors help students understand the development of the geologic time scale, including how this depended on gathering evidence and making comparisons.
The major time periods in earth's history are introduced, as well as are fossils and the role they play in helping us understand this history.
Students will likely have been introduced to the geologic time scale in earlier grades, so this lesson is structured loosely to enable you to adapt the content to match the levels and needs of your particular students.
To help students understand the development of the geologic time scale.
Also, to introduce students to the major time periods in earth's history, as well as to the role fossils play in helping us understand this history.
Another option would be for you to order print materials directly from the USGS.
Students will likely have been introduced to the geologic time scale in earlier grades, so take this opportunity to review basic concepts and find out the extent to which they are familiar with this topic.
One chapter called Fossil Succession, found in the online booklet Fossils, Rocks, and Time, is particularly useful in helping students understand that the basic idea of biological evolution is that the earth's present-day species developed from earlier, distinctively different species. 125.) Specifically, it helps students understand that the kinds of animals and plants found as fossils change over time.It discusses how Darwin's theory gave scientific meaning to the observed succession of once-living species in the record of earth's history preserved in the rocks.